pre-emption
/ˌpriːˈempʃən/noun
mass noun
1
- the purchase of goods or shares by one person or party before the opportunity is offered to others优先购买：
the commission had the right of pre-emption.
委员会有优先购买权。
1.1
- historical, chiefly N. Amer. & Austral.the right to purchase public land in this way〈史, 主北美, 主澳〉公共土地优先购买权。
2
- the action of pre-empting or forestalling, especially of making a pre-emptive attack抢先占有; 先发制人（尤指抢先攻击）：
damaging retaliation for any attempt at pre-emption.
对任何企图先发制人的毁灭性报复。
2.1
- N. Amer.the interruption or replacement of a scheduled radio or television programme〈北美〉（广播或电视节目的）插播, 替换。
词源
early 17th cent.: from medieval Latin praeemptio（n-）, from the verb praeemere, from prae 'in advance'+emere 'buy'.